if(!$meta_type||!is_numeric($object_id)){returnfalse;}$object_id=absint($object_id);if(!$object_id){returnfalse;}/** This filter is documented in wp-includes/meta.php */$check=apply_filters("get_{$meta_type}_metadata",null,$object_id,$meta_key,true);if(null!==$check){return(bool)$check;}$meta_cache=wp_cache_get($object_id,$meta_type.'_meta');if(!$meta_cache){$meta_cache=update_meta_cache($meta_type,array($object_id));$meta_cache=$meta_cache[$object_id];